Select the option that is related to the third term in the same way as the second term is related to the first term

Ganga : Gangotri :: Godavari : ?

Circle : Sphere :: Square : ?

The below names are related by certain logic.
From the options, select the one that can be made a part of this group of names.
Tarapur, Kudankulam, Kaiga, Kakrapar,Kalpakkam, Narora

The following contains two pairs of words which are related to each other in a certain way. Three of the following four word-pairs are alike as these have the same relationship and thus form a group. Which word-pair does NOT belong to that group? (The words must be considered as meaningful English words and must not be grouped based on the number of letters/number of consonants/vowels in the word)

'Kabaddi' is related to 'Bangladesh' in the same way 'Volleyball' is related to '____________'.

Identify the odd word from the given options.

Circle : Sphere :: Square : ?

The below names are related by certain logic.
From the options, select the one that can be made a part of this group of names.
Tarapur, Kudankulam, Kaiga, Kakrapar,Kalpakkam, Narora